<template>
  <div id="addgoods">
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
        <el-alert title="添加商品信息"  type="info" center :closable="false" show-icon></el-alert>
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>


        <el-form :model="addForm" :rules="addFormRul" ref="addFormRef" label-width="100px" label-position="top" >
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
                <el-form-item label="商品名称" prop="goods_name">
                    <el-input v-model="addForm.goods_name"></el-input>
                </el-form-item>

                <el-form-item label="商品价格" prop="goods_price">
                    <el-input type="number" v-model="addForm.goods_price"></el-input>
                </el-form-item>

                <el-form-item label="商品重量" prop="goods_weight">
                    <el-input type="number" v-model="addForm.goods_weight"></el-input>
                </el-form-item>

                <el-form-item label="商品数量" prop="goods_number">
                    <el-input type="number" v-model="addForm.goods_number"></el-input>
                </el-form-item>

                 <el-form-item label="父级分类:" prop="goods_cat">
                <el-cascader
                    v-model="addForm.goods_cat"
                    :options="catelist"
                    :props="cateProp"
                    clearable
                    filterable
                    @change="handleChange">
                </el-cascader>
            </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
                <el-form-item v-for="item in manyData" :key="item.attr_id" :label="item.attr_name" >
                    <el-checkbox-group v-model="item.attr_vals">
                        <el-checkbox v-for="cb in item.attr_vals" :key="cb" border  :label="cb">
                        </el-checkbox>
                    </el-checkbox-group>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
                <el-form-item v-for="item in onlyData" :key="item.attr_id" :label="item.attr_name" >
                    <el-input v-model="item.attr_vals"></el-input>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
                <el-upload
                :action="uploadUrl"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                :headers="headersobj"
                :on-success="handleSuccess"
                list-type="picture">
                    <el-button size="small" type="primary">点击上传</el-button>
                </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
                <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品 -->
            <el-button type="primary" class="btnAdd" @click="btnAdd" >添加商品</el-button>
            </el-tab-pane>
        </el-tabs>
        </el-form>
    </el-card>


    <el-dialog
    title="预览图片"
    :visible.sync="dialogVisible"
    width="50%"
    >
    <img :src="previewURL" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'addgoods',
  data() {
      return {
          activeIndex:'0',
          addForm:{
              goods_name:'',
              goods_price:0,
              goods_weight:0,
              goods_number:0,
              goods_cat:[],
              pics:[],
              goods_introduce:'',
              attrs:[]
          },
          addFormRul:{
              goods_name:[{required: true, message: '请输入商品名称', trigger: 'blur' }],
              goods_price:[{required: true, message: '请输入商品价格', trigger: 'blur' }],
              goods_weight:[{required: true, message: '请输入商品重量', trigger: 'blur' }],
              goods_number:[{required: true, message: '请输入商品数量', trigger: 'blur' }],
              goods_cat:[{required: true, message: '请输选择商品分类', trigger: 'blur' }]
          },
          catelist:[],
          cateProp:{
              label:'cat_name',
              value:'cat_id',
              children:'children'
          },
          manyData:[],
          onlyData:[],
          uploadUrl:'http://47.115.124.102:8888/api/private/v1/upload',
          headersobj:{
              Authorization:window.sessionStorage.getItem('token')
          },
          previewURL:'',
          dialogVisible:false
          
      }
  },
  created(){
      this.getGoodsCate()
  },
  computed:{
      cateId(){
          if(this.addForm.goods_cat.length==3){
              return this.addForm.goods_cat[2]
          }
          return null
      }
  },
  methods: {
      async getGoodsCate(){
          const{data:res}=await this.$http.get('categories')
          if(res.meta.status!=200){
              return this.$message.error(res.meta.msg)
          }
          this.catelist=res.data
      },
      handleChange(){
          if(this.addForm.goods_cat.length!==3){
              this.addForm.goods_cat=[]
          }
      },
      beforeTabLeave(activeName,oldactiveName){
          if(oldactiveName==0&&this.addForm.goods_cat.length!==3){
              this.$message.error('请先选择第三级分类列表')
              return false
          }
      },
      async tabClicked(){
          if(this.activeIndex==1){
              const{data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
                 if(res.meta.status!=200){
                     return this.$message.error(res.meta.msg)
                 }
                 res.data.forEach(item=>{
                      item.attr_vals=item.attr_vals.length==0 ? [] : item.attr_vals.split(' ')
                 })
                 this.manyData=res.data
          }

          if(this.activeIndex==2){
              const{data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                 if(res.meta.status!=200){
                     return this.$message.error(res.meta.msg)
                 }
                 this.onlyData=res.data
          }
      },
      handlePreview(file){
          this.previewURL=file.response.data.url
          this.dialogVisible=true

      },
        // 处理移除图片的操作
        handleRemove (file) {
            // 1.获取将要删除图片的临时路径
            const filePath = file.response.data.tmp_path
            // 2.从pics数组中，找到图片对应的索引值
            const i = this.addForm.pics.findIndex(x => x.pic === filePath)
            // 3.调用splice方法，移除图片信息
            this.addForm.pics.splice(i, 1)
        },
      handleSuccess(response){//图片上传成功的事件
          const picinfo={pic:response.data.tmp_path}
          this.addForm.pics.push(picinfo)
      },
      btnAdd(){
          this.$refs.addFormRef.validate(async valid=>{
              if(!valid){
                  return this.$message.error('请填写必填项')
              }
            //将数组转为字符串
            const form=_.cloneDeep(this.addForm)
             form.goods_cat=form.goods_cat.join(',')
            //处理动态参数和静态属性
            this.manyData.forEach(item=>{
                const newinfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
                this.addForm.attrs.push(newinfo)
            })
            // 处理静态属性
            this.onlyData.forEach(item => {
            const newInfo = {
                attr_id: item.attr_id,
                attr_value: item.attr_vals
            }
            this.addForm.attrs.push(newInfo)
            })
            form.attrs = this.addForm.attrs
            // 发起请求添加商品
            // 商品名称必须是唯一的
            const { data: res } = await this.$http.post('goods', form)
            if (res.meta.status !== 201) return this.$message.error('添加商品失败！')
            this.$message.success('添加商品成功!')
            this.$router.push('/goods')

            
          })
      }
  },
}
</script>

<style scoped>
    .el-steps{
        margin-top: 20px;
        margin-bottom: 20px;
    }
    .el-checkbox{
        margin:0 5px 0 0 !important;
    }
    .previewImg{
        width: 100%;
    }
    .btnAdd{
        margin-top: 20px;
    }
</style>
